CSS Box-Sizing Tip For Beginners
System icons (Material Design)
System icons symbolize common actions, files, devices, and directories.
How to Tune Typography Based on Characters Per Line
Device Metrics - Material Design
A comprehensive resource for sizing, resolution, and more across multiple devices.
App Icon Sizes · phonegap/phonegap Wiki · GitHub
access core functions on Android, iPhone and Blackberry using JavaScript - phonegap/phonegap
Android (4.1) Icon Size Guide Made Simple
What are Android Icon Sizes? Our icon design team provide this guide on Android Launcher Icon Sizes, Action Bar Icons, Contextual & Notification Icons sizes
Photographic Print Sizes (Wikipedia)
Standard photographic print sizes are used in photographic printing. Cut sheets of paper meant for printing photographs are commonly sold in these sizes.
Paper Sizes (Wikipedia)
There have been many standard sizes of paper at different times and in different countries, but today there are two widespread systems in use: the international standard (A4 and its siblings) and the North American sizes.